A spot in the next round is at stake on Wednesday, when Elise Mertens goes up against Panna Udvardy in the Monterrey round of 16. Elise Mertens is searching for form, having lost 2 in a row (6 of the last 10). Panna Udvardy is searching for form, having lost 3 in a row (3 of the last 10).

Elise Mertens is clearly higher-rated on hard — our number puts Mertens around 71%. Udvardy comes in off a compressed schedule. The edge belongs to Mertens — real, but not the kind you take for granted at this level.